WO2021088454A1 - Lentille ayant deux barillets de lentille, module de lentille et procédé d'assemblage - Google Patents

Lentille ayant deux barillets de lentille, module de lentille et procédé d'assemblage Download PDF

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Publication number
WO2021088454A1
WO2021088454A1 PCT/CN2020/109675 CN2020109675W WO2021088454A1 WO 2021088454 A1 WO2021088454 A1 WO 2021088454A1 CN 2020109675 W CN2020109675 W CN 2020109675W WO 2021088454 A1 WO2021088454 A1 WO 2021088454A1
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WO
WIPO (PCT)
Prior art keywords
lens
lens barrel
barrel
image sensor
end surface
Prior art date
Application number
PCT/CN2020/109675
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English (en)
Chinese (zh)
Inventor
邓彬全
熊鑫煜
Original Assignee
江西联益光学有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 江西联益光学有限公司 filed Critical 江西联益光学有限公司
Priority to EP20848931.0A priority Critical patent/EP3865924B1/fr
Priority to US17/138,954 priority patent/US11711601B2/en
Publication of WO2021088454A1 publication Critical patent/WO2021088454A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

Definitions

  • This application relates to the field of optical systems, and in particular to a dual-tube lens, a lens module and an assembly method.
  • lens imaging technology lenses are more and more used in vehicle monitoring, panoramic camera, extreme sports and other fields.
  • the production yield of lenses in these fields is generally low.
  • One of the factors is the processing of various parts of the lens module. And the assembly accuracy is not up to the requirements.
  • Existing lens modules usually include a lens barrel and optical components contained in the lens barrel, and the lens is usually an integrated structure, because the lens must be combined with the image sensor component on the PCB (Printed Circuit Board) after it leaves the factory. So how to ensure that the focal position of the lens is highly coincident with the center position of the image sensor has always been the research direction of relevant technicians.
  • PCB Print Circuit Board
  • the purpose of the embodiments of the present application is to provide a dual-tube lens, a lens module, and an assembly method to solve the above-mentioned problems.
  • an embodiment of the present application provides a dual-tube lens, including a first lens tube and a second lens tube.
  • the first lens barrel includes a first end close to the object side, a second end close to the image side, and a lens group arranged in the first lens barrel.
  • the outer surface of the second end is provided with an external thread.
  • the second lens barrel includes a first end surface close to the object side, a second end surface close to the image side, and an inner surface connecting the first end surface and the second end surface. The external thread connection of the lens barrel.
  • an embodiment of the present application provides a lens module including a first lens barrel, a second lens barrel, and an image sensor assembly.
  • the first lens barrel includes a first end close to the object side, a second end close to the image side, and a lens group arranged in the first lens barrel.
  • the outer surface of the second end is provided with an external thread.
  • the second lens barrel includes a first end surface close to the object side, a second end surface close to the image side, and an inner surface connecting the first end surface and the second end surface.
  • the image sensor assembly includes a substrate, an image sensor electrically connected to the substrate, and an adhesive layer. The substrate is bonded to the second end surface of the second lens barrel through the adhesive layer.
  • an embodiment of the present application provides a method for assembling a double barrel lens, including: providing a first barrel, a second barrel, and an image sensor assembly.
  • the image sensor assembly includes a substrate and an image sensor on one side of the substrate; Connect the second lens barrel with the outer thread of the first lens barrel through internal threads; set the standard plate on the side of the substrate close to the image sensor, and set the second end surface of the second lens barrel on the side of the standard plate away from the substrate,
  • the distance along the axis of the double-barrel lens adjust the threaded connection position between the first barrel and the second barrel so that the focal point of the lens group coincides with the center of the image sensor to form a double-barrel lens.
  • an embodiment of the present application provides a method for assembling a lens module, including: providing a first lens barrel, a second lens barrel, and an image sensor assembly; Threaded connection; set the standard board on the side of the substrate close to the image sensor, and set the second end surface of the second lens barrel on the side of the standard board away from the substrate.
  • the thickness of the image sensor in the axial direction of the double lens barrel is h
  • the threaded connection position between the barrel and the second lens barrel makes the focal point of the lens group coincide with the center of the image sensor to form a double-tube lens; the double-tube lens is arranged on the side of the image sensor assembly close to the image sensor, And an adhesive layer is coated between the double-tube lens and the substrate of the image sensor assembly, the thickness of the adhesive layer is ⁇ ; the double-tube lens and the image sensor assembly are fixed.
  • the embodiments of the present application provide a dual-tube lens, a lens module, and an assembly method.
  • the thread between the first lens tube and the second lens tube By adjusting the thread between the first lens tube and the second lens tube, the focus of the lens and the center of the image sensor are realized.
  • the lens has the minimum EFL tolerance.
  • the dual-tube lens provided by the embodiments of the application has a simple structure and a small EFL tolerance.
  • FIG. 1 is a schematic diagram of the structure of a dual-tube lens provided in an embodiment of the application
  • FIG. 2 is a cross-sectional view of a first lens barrel of a dual lens barrel lens provided in an embodiment of the application;
  • FIG. 3 is a schematic structural diagram of a second lens barrel of a dual lens barrel lens provided in an embodiment of the application;
  • FIG. 4 is a cross-sectional view of a dual-tube lens provided in an embodiment of the application.
  • FIG. 5 is a schematic structural diagram of a fastener for a dual-tube lens provided in an embodiment of the application
  • FIG. 6 is a cross-sectional view of a second lens barrel of a double lens barrel lens provided in an embodiment of the application;
  • FIG. 7 is a cross-sectional view of a lens module provided in an embodiment of the application.
  • FIG. 8 is an assembly flow chart of a dual-tube lens provided in an embodiment of the application.
  • FIG. 9 is an assembly structure diagram of a dual-tube lens provided in an embodiment of the application.
  • FIG. 10 is an assembly flowchart of a lens module provided in an embodiment of the application.
  • FIG. 11 is an assembly structure diagram of a lens module provided in an embodiment of the application.
  • the existing lens module usually includes a lens barrel and an optical element contained in the lens barrel, because the lens has an integrated lens barrel structure.
  • the inventor discovered through research that there are many deficiencies in the prior art, such as: the height direction of the lens body has manufacturing tolerances, the lens assembly between the optical elements has cumulative tolerances, the lens mount connecting the lens and the image sensor assembly has manufacturing tolerances, image sensors Components have patch tolerances, etc.
  • the tolerances will be superimposed and magnified. At present, the tolerance of this superposition has reached more than 0.3-0.5mm, which has a great impact on the imaging of the lens module.
  • the inventor found that if the EFL (Effective Focal Length) tolerance value of the lens can be controlled, then when the lens is combined with the image sensor assembly, the focus of the lens and the image sensor can be accurately and quickly achieved. The center coincides, thereby improving the product yield and assembly efficiency. Therefore, the dual-tube lens, the lens module, and the assembly method in the embodiments of the present application are proposed.
  • FIG. 1 is a schematic structural diagram of a dual-tube lens 10 provided in an embodiment of the application.
  • the double barrel lens 10 includes a first barrel 110 and a second barrel 120.
  • the first lens barrel 110 and the second lens barrel 120 are assembled together to form a lens, and the first lens barrel 110 is closer to the object side than the second lens barrel 120.
  • both the first lens barrel 110 and the second lens barrel 120 can be understood as a single lens barrel, or can be understood as a combination of several lens barrels as a whole.
  • FIG. 2 is a cross-sectional view of the first lens barrel 110 of the dual lens barrel lens 10 provided in an embodiment of the present application.
  • the first lens barrel 110 may be a hollow straight tube and includes a first end 111 close to the object side. , The second end 112 near the image side and the lens group 113 arranged in the first lens barrel 110.
  • the first end 111 of the first lens barrel 110 can be used to cooperate with other lens barrels or with other optical components (for example, an optical film, a lens cover, etc.).
  • the light emitted or reflected by the object to be photographed enters the interior of the first lens barrel 110 through the first end 111.
  • a lens group 113 is provided inside the first lens barrel 110.
  • the lens group 113 may include multiple groups of lenses.
  • the outer periphery of the lens group 113 is wrapped by the first lens barrel 110 to form an assembly of the multiple groups of lenses.
  • the lens may be a spherical lens or an aspheric lens. The specific number and combination of lenses are not limited in this application.
  • the second end 112 of the first lens barrel 110 is used for mating with the second lens barrel 120.
  • the outer surface 1120 of the second end 112 is provided with an external thread 1121 for threaded engagement with the inner surface 123 of the second lens barrel 120.
  • FIG. 3 is a schematic structural diagram of the second lens barrel 120 of the dual-tube lens 10 provided in an embodiment of the application.
  • the second lens barrel 120 includes a first end surface 121 close to the object side and a first end surface 121 close to the image side.
  • the two end surfaces 122 and the inner surface 123 connecting the first end surface 121 and the second end surface 122 are provided with internal threads 124 on the inner surface 123.
  • the internal thread 124 of the second lens barrel 120 is threadedly connected with the external thread 1121 of the first lens barrel 110, that is, the first lens barrel 110 and the second lens barrel 120 can be assembled during the assembly process.
  • the relative rotation is achieved by threads, thereby changing the positional relationship between the first lens barrel 110 and the second lens barrel 120, and then the positional relationship between the lens group 113 in the first lens barrel 110 and the image sensor assembly 200.
  • the external thread 1121 of the first lens barrel 110 and the internal thread 124 of the second lens barrel 120 may be a clearance fit.
  • FIG. 4 shows a cross-sectional view of a dual-barrel lens 10 provided by an embodiment of the application.
  • the focal length of the lens group 113 in the first lens barrel 110 is marked as f
  • the optical center O of the lens group 113 and the second lens group 113 are marked as f.
  • the distance of the second end surface 122 of the lens barrel 120 is marked as H.
  • the correction coefficient ⁇ is used to correct the distance between the second end surface 122 and the image sensor assembly 200 so that the focal point of the lens group 113 coincides with the center of the image sensor 220. It should be noted that the center of the image sensor 220 refers to the center of the image sensor 220 close to the side surface of the dual-tube lens 10.
  • the lens By adjusting the thread between the first lens barrel 110 and the second lens barrel 120, the focal point of the lens coincides with the center of the image sensor 220. Then, after the first lens barrel 110 and the second lens barrel 120 are fixed, the lens has the minimum EFL tolerance.
  • the structural parameters of the image sensor assembly 200 such as the distance from the center of the image sensor 220 to the surface of the substrate 210) are known, the focal length of the lens group 113 and the distance from the center of the image sensor 220 to the surface of the substrate 210 can be used.
  • the first lens barrel 110 may further include a stop ring 114.
  • the limiting ring 114 is disposed on the outer surface 1120 of the second end 112 of the first lens barrel 110 adjacent to the external thread 1121, and the limiting ring 114 is closer to the object side relative to the external thread 1121.
  • the stop ring 114 protrudes more outward relative to the external thread 1121, that is, the outer diameter of the stop ring 114 is greater than the maximum outer diameter of the external thread 1121, and the assembly Later, the limiting ring 114 can abut against the inner wall of the second lens barrel 120 to better play a limiting role.
  • the double barrel lens 10 further includes a fastener 115.
  • An annular groove 116 is formed between the limit ring 114 and the external thread 1121 (as shown in FIG. 2).
  • the fastener 115 may be disposed in the annular groove 116.
  • FIG. 5 is a structural schematic diagram of the fastener 115 in the dual-lens tube lens 10 provided in the embodiment of the present application.
  • the fastener 115 may be an elastic washer or a wave washer. It is understandable that in the process of selecting materials, materials with light weight, moderate price and good elastic strain capacity can be selected, such as rubber.
  • FIG. 6 shows a cross-sectional view of the second lens barrel 120 of the dual lens barrel lens 10 provided in the embodiment of the present application.
  • the second lens barrel 120 further includes a bearing platform 125, which is disposed on the second lens barrel.
  • the inner side of the lens barrel 120 is adjacent to the internal thread 124, and the carrying platform 125 is closer to the object side than the internal thread 124.
  • the bearing platform 125 includes a side surface 1250 connected to the first end surface 121 and a bearing surface 1251 connected between the side surface 1250 and the inner surface 123.
  • the side surface 1250 and the bearing surface 1251 form an accommodating space 1252, and the accommodating space 1252 is used for accommodating the limiting ring 114 and the fastener 115.
  • first end surface 121 is also provided with a glue dispensing groove 1210 for dispensing glue.
  • glue dispensing groove 1210 may be connected with the accommodating space 1252 of the carrying platform 125 to facilitate the glue to enter the accommodating space 1252, so that the first lens barrel 110 and the second lens barrel 120 are better fixed.
  • the bonding medium between the first lens barrel 110 and the second lens barrel 120 is AA glue, UV glue, thermosetting glue, UV thermosetting glue, epoxy glue, pressure sensitive glue, Moisture-curable adhesives and light-curable adhesives may be one or a combination of the above.
  • the second lens barrel 120 is used to assemble the first lens barrel 110, and an adhesive medium is used to fix the first lens barrel 110 and the second lens barrel 120 during assembly.
  • the inner surface 123 of the second lens barrel 120 is provided with an internal thread 124 and a bearing platform 125.
  • a lens barrel 110 is screwed into the second lens barrel 120, the external thread 1121 ensures the stability of the first lens barrel 110 under the constraint of the internal thread 124, and the lower surface of the stop ring 114 abuts against the carrying platform 125 by the fastener 115 On the upper surface of the upper surface, the fastener 115 is wrapped in the annular groove 116, and the fastener 115 has elasticity, which ensures the stability of the assembly between the first lens barrel 110 and the second lens barrel 120.
  • the optical center O of the lens group 113 and the second lens barrel 120 can be adjusted.
  • the correction coefficient ⁇ is used to correct the distance between the second end surface 122 and the image sensor assembly 200 so that the focal point of the lens group 113 coincides with the center of the image sensor 220 in the image sensor assembly 200.
  • the double-barrel lens 10 provided by the embodiment of the present application realizes that the focal point of the double-barrel lens 10 coincides with the center of the image sensor 220 in the image sensor assembly 200 by adjusting the thread between the first lens barrel 110 and the second lens barrel 120 , And then fix the first lens barrel 110 and the second lens barrel 120 with glue. At this time, the lens has the minimum EFL tolerance.
  • the dual-tube lens 10 provided by the embodiment of the present application has a simple structure and a small EFL tolerance.
  • the focus of the dual-tube lens 10 and the center of the image sensor 220 can be accurately and quickly realized The overlap, thereby effectively improving the yield of the product matched with the image sensor assembly 200, and improving the production efficiency.
  • FIG. 7 shows a cross-sectional view of the lens module 20 provided in an embodiment of the present application.
  • the embodiment of the present application also provides a lens module 20, including a first lens barrel 110, a second lens barrel 120, and an image Sensor assembly 200.
  • the structures of the first lens barrel 110 and the second lens barrel 120 in the embodiment of the present application are the same as those in the foregoing embodiment, and will not be repeated here.
  • the image sensor assembly 200 in the embodiment of the present application may include a substrate 210, an image sensor 220 electrically connected to the substrate 210, and an adhesive layer 230.
  • the substrate 210 is bonded to the second end surface of the second lens barrel 120 through the adhesive layer 230 122.
  • the correction coefficient ⁇ is the distance between the center C of the image sensor 220 and the adhesive layer 230 along the optical axis direction of the lens group 113.
  • the center C of the image sensor 220 is the center C on the side of the image sensor 220 away from the substrate 210. Since the correction coefficient ⁇ can be used to correct the distance between the second end surface 122 and the image sensor assembly 200, the focus of the lens can be accurately and quickly achieved.
  • the center C of the image sensor 220 coincides, thereby effectively improving the yield of the product matched with the image sensor assembly 200 and improving the production efficiency.
  • the embodiment of the present application also provides a method for assembling the double-barrel lens 10, please refer to FIG. 8, which shows the assembling flowchart of the double-barrel lens 10 provided in the embodiment of the present application, and the details are as follows:
  • S110 Provide the first lens barrel 110, the second lens barrel 120 and the image sensor assembly 200.
  • the structures of the first lens barrel 110 and the second lens barrel 120 are the same as those shown in FIG. 4. For details, reference may be made to the description of the corresponding embodiment, which will not be repeated here.
  • the image sensor assembly 200 includes a substrate 210 and an image sensor 220 on one side of the substrate 210. Please refer to FIG. 7.
  • a lens group 113 is installed in the first lens barrel 110, and the second lens barrel 120 is threadedly connected with the first lens barrel 110.
  • the fastener 115 is sleeved in the annular groove 116 of the first lens barrel 110, the first lens barrel 110 is pre-installed into the second lens barrel 120, and the second lens barrel 120 is connected to the second lens barrel 120 through the internal thread 124.
  • the external thread 1121 of a lens barrel 110 is connected, and the fastener 115 abuts on the bearing surface 1251 of the second lens barrel 120, as shown in FIG. 4.
  • S130 Provide a standard plate 240 with a thickness of ⁇ , set the standard plate 240 on the side of the substrate 210 close to the image sensor 220, and set the second end surface 122 of the second lens barrel 120 on the side of the standard plate 240 away from the substrate 210, Therefore, a gap of ⁇ is reserved between the second end surface 122 of the second lens barrel 120 and the substrate 210 of the image sensor assembly 200.
  • FIG. 9 shows the assembly structure diagram of the dual-tube lens 10 provided in the embodiment of the application.
  • the correction coefficient ⁇ is the distance between the center C of the image sensor 220 and the side of the standard plate 240 away from the substrate 210 along the axis of the dual-tube lens 10, and the center C of the image sensor 220 refers to the side of the image sensor 220 away from the substrate 210. center.
  • ⁇ is greater than or equal to 100um and less than or equal to 500um.
  • the image sensor assembly 200 is placed on a horizontal working surface with one end of the image sensor 220 facing upwards.
  • the standard board 240 is closely attached to the top of the image sensor assembly 200, that is, the standard board 240 is attached to the side of the substrate 210 close to the image sensor 220.
  • the standard plate 240 may be a ring-shaped thin plate structure, and the standard plate 240 is sleeved on the outer periphery of the image sensor 220 and attached to the substrate 210 at the same time.
  • S140 Adjust the screw connection position between the first lens barrel 110 and the second lens barrel 120 so that the focal point of the lens group 113 in the first lens barrel 110 coincides with the center C of the image sensor 220 to form a double barrel lens 10 .
  • the purpose of overlapping the focal point of the lens group 113 with the center C of the image sensor 220 is achieved.
  • adjusting the threaded connection position between the first lens barrel 110 and the second lens barrel 120 refers to rotating the first lens barrel 110 relative to the second lens barrel 120.
  • the distance from the optical center O of the lens group 113 in the first lens barrel 110 to the center C of the image sensor 220 is adjusted by changing the screw connection position of the first lens barrel 110 relative to the second lens barrel 120, and the distance is made equal to the lens.
  • the focal length of group 113 is f. In this way, the double-barrel lens 10 achieves the best imaging distance and has the best imaging effect.
  • the first lens barrel 110 and the second lens barrel 120 form the double-barrel lens 10.
  • the embodiment of the present application also provides an assembling method of the lens module 20. Please refer to FIG. 10, which shows an assembling flowchart of the lens module 20 provided in the embodiment of the present application. The details are as follows:
  • S210 Provide the first lens barrel 110, the second lens barrel 120 and the image sensor assembly 200.
  • the structures of the first lens barrel 110 and the second lens barrel 120 are the same as those shown in FIG. 4. For details, reference may be made to the description of the corresponding embodiment, which will not be repeated here.
  • the structure of the image sensor assembly 200 is the same as the structure shown in FIG. 7. For details, reference may be made to the description of the corresponding embodiment, which will not be repeated here.
  • S220 Connect the second lens barrel 120 with the outer thread 1121 of the first lens barrel 110 through the inner thread 124.
  • connection of the second lens barrel 120 and the first lens barrel 110 please refer to the above-mentioned method of assembling the double-tube lens 10, and for details, please refer to the description of the corresponding embodiment, which will not be repeated here.
  • S230 Provide a standard board 240.
  • the standard board 240 is arranged on the side of the substrate 210 in the image sensor assembly 200 close to the image sensor 220, and the second end surface 122 of the second lens barrel 120 is arranged on a side of the standard board 240 away from the substrate 210. side.
  • the correction coefficient ⁇ is the distance between the center C of the image sensor 220 and the side of the standard plate 240 away from the substrate 210 along the axis of the dual-tube lens 10. It is worth noting that the center C of the image sensor 220 refers to the distance from the image sensor 220. The center of one side of the substrate 210.
  • the thickness of the standard plate 240 is ⁇ , which is greater than or equal to 100 um and less than or equal to 500 um.
  • the standard plate 240 can be a ring-shaped sheet type structure. During installation, the standard plate 240 is sleeved on the outer periphery of the image sensor 220 and attached to the substrate 210 at the same time.
  • the upper surface of the standard plate 240 is a flat horizontal surface, which is beneficial for adjusting the focal point of the lens group 113 to coincide with the center C of the image sensor 220.
  • the formed double-barrel lens 10 can be used as a finished lens or a semi-finished product.
  • the double-barrel lens 10 can be assembled with the image sensor assembly 200 to form a lens module 20, or it can be assembled with other image sensor components to form a lens module.
  • the double-barrel lens 10 and the image sensor assembly 200 are assembled, the double-barrel lens 10 and the standard plate 240 are removed from above the image sensor assembly 200 first.
  • the double-tube lens 10 When the double-tube lens 10 is assembled with other image sensor components, the double-tube lens 10 is directly arranged above the image sensor component.
  • the following steps describe the assembly process by taking the assembly of the dual-tube lens 10 and the image sensor assembly 200 as an example. Please also refer to FIG. 11, which shows an assembly structure diagram of the lens module 20 provided in an embodiment of the application.
  • the double-barrel lens 10 is arranged on the side of the image sensor assembly 200 close to the image sensor 220, and an adhesive layer 230 is coated between the double-barrel lens 10 and the substrate 210 of the image sensor assembly 200 to make it sticky.
  • the thickness of the junction layer 230 is ⁇ .
  • the material of the adhesive layer 230 can be AA glue, UV glue, thermosetting glue, UV thermosetting glue, epoxy resin glue, pressure sensitive glue, moisture curing glue, or light curing glue, or one or more of the above. Kind of combination.
  • the adhesive layer 230 is coated between the double barrel lens 10 and the substrate 210 of the image sensor assembly 200.
  • the adhesive layer 230 may be coated on the surface of the substrate 210, or on the second end surface of the double barrel lens 10. 122 Coating adhesive layer 230. Wherein, when coating the adhesive layer 230, try to ensure that the thickness of the adhesive layer 230 is uniform, so as to minimize the EFL tolerance.
  • S260 Adjust the double-barrel lens 10 again so that the focal point of the double-barrel lens 10 coincides with the center C of the image sensor 220.
  • adjusting the double-barrel lens 10 includes AA focusing, and the AA is used for focusing to make the surrounding image of the double-barrel lens 10 clear and consistent.
  • fixing the dual-tube lens 10 and the image sensor assembly 200 may include: baking and fixing the adhesive layer 230; testing the MTF (Modulation Transfer Function) value of the dual-tube lens 10; if the MTF If the value meets the preset value, the glue is dispensed in the dispensing groove 1210 between the first barrel 110 and the second barrel 120 of the dual-tube lens 10, and baked and cured; if the MTF value does not meet the preset value, Then, the second focusing is performed, that is, the first lens barrel 110 is rotated relative to the second lens barrel 120, and the focus of the lens group 113 coincides with the center C of the image sensor 220 by refocusing. After the second focusing is completed, the MTF test is performed again until the MTF value meets the preset value, and then the glue is dispensed in the glue tank 1210 and baked and cured.
  • MTF Modulation Transfer Function
  • the double-barrel lens 10 and the lens module 20 provided by the embodiments of the present application adopt the above-mentioned assembly method, which can not only accurately and quickly realize the coincidence of the focal point of the lens with the center C of the image sensor 220, but also enable the double-barrel lens 10 to overlap with the center C of the image sensor 220.
  • the EFL tolerance is reduced to a minimum, thereby effectively improving the yield of product assembly and improving production efficiency.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)

Abstract

L'invention concerne une lentille (10) ayant deux barillets de lentille, un module de lentille (20) et un procédé d'assemblage. La lentille (10) ayant deux barillets de lentille comprend un premier barillet de lentille (110) et un second barillet de lentille (120). Le premier barillet de lentille (110) comprend une première partie d'extrémité (111), une seconde partie d'extrémité (112), et un groupe de lentilles (113) disposé dans le premier barillet de lentille (110), une surface externe (1120) de la seconde partie d'extrémité (112) étant pourvue d'un filetage externe (1121). Le second barillet de lentille (120) comprend une première surface d'extrémité (121), une seconde surface d'extrémité (122), et une surface interne (123), la surface interne (123) étant pourvue d'un filetage interne (124), et le second barillet de lentille (120) étant relié au filetage externe (1121) du premier barillet de lentille (110) au moyen du filetage interne (124). Une distance H entre un centre optique (O) du groupe de lentilles (113) et la seconde surface d'extrémité (122) du second barillet de lentille (120), une longueur focale (FL) f du groupe de lentilles (113), et un coefficient de correction α satisfont une expression relationnelle : H=f+α, le coefficient de correction α étant utilisé pour corriger une distance entre la seconde surface d'extrémité (122) et un composant de capteur d'image (200), de telle sorte qu'un point focal f du groupe de lentilles (113) coïncide avec le centre d'un capteur d'image (220). La lentille (10) ayant deux barillets de lentille est de structure simple et moins dans la tolérance EFL, de telle sorte que le point focal f de la lentille peut coïncider avec précision et rapidement avec le centre du capteur d'image (220), ce qui permet d'améliorer le rendement d'un produit qui est combiné au composant de capteur d'image (200).
PCT/CN2020/109675 2019-11-07 2020-08-18 Lentille ayant deux barillets de lentille, module de lentille et procédé d'assemblage WO2021088454A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20848931.0A EP3865924B1 (fr) 2019-11-07 2020-08-18 Lentille ayant deux barillets de lentille, module de lentille et procédé d'assemblage
US17/138,954 US11711601B2 (en) 2019-11-07 2020-12-31 Double barrels lens, lens module and assembling method therefor

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201911082815 2019-11-07
CN201911082815.8 2019-11-07
CN202010356083.3A CN112526692B (zh) 2019-11-07 2020-04-29 双镜筒镜头、镜头模组及组装方法
CN202010356083.3 2020-04-29

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